'''
变量
'''
age = 50
print('年龄：', age)
if age < 18:
    print('未成年')

b = 89
a = True
a2 = 0x4f
c = '你好'
d = c
a3 = age
b += 1
b2 = b + a3 + 20
print(d,id(d))
print()
c1 = c2 = c3 = 100
print('c：',id(c))

if __name__ == '__main__':
    pass
